The Cylinder Archive [www.cylinder.de
] intermediate archival release:
Riccardo Martin is singing Ah si ben mio from Il Trovatore by Giuseppe Verdi, recorded in 1909 on Edison Amberol Grand Opera series #B161.
While this acoustic recording itself has a frequency range up to approx. 4 KHz, the harmonic content goes well beyond 6 KHz and is essential for a psycho-acoustic recognition of certain clarity.